Declined admission decision, is it too late to try and accept?

I was accepted to both CSULA and CSUF for Spring 2021 and never accepted the admission with thoughts of going to UCR. UCR is asking for a lot of money and I wanted to try regaining my admission to CSULA or CSUF. I don’t really know where to start. Spring 2021 is approaching and I’m not sure if I’m too late or not. Any advice or help on this? Should I try an appeal??

Did you miss the response deadline? If not, just accept and pay your deposit, then email admissions at UCR to explain you won’t be attending. You may lose your deposit at UCR.

I would email the admissions office at CSULB and ask if it’s still possible to attend for spring 2021. State clearly that you will definitely attend if accepted. If no luck at CSULB, then try CSUF.